Adds ability to exempt areas from unit tests on a per-map basis

code/unit_tests/map_tests.dm

@@ -12,7 +12,8 @@
 					/area/holodeck,
 					/area/supply/station,
 					/area/mine,
-					/area/vacant/vacant_shop
+					/area/vacant/vacant_shop,
+					/area/turbolift
 					)
 
 	var/list/exempt_from_atmos = typesof(/area/maintenance,
@@ -33,6 +34,11 @@
 						/area/vacant/vacant_shop
 						)
 
+	// Some maps have areas specific to the map, so include those.
+	exempt_areas += using_map.unit_test_exempt_areas
+	exempt_from_atmos += using_map.unit_test_exempt_from_atmos
+	exempt_from_apc += using_map.unit_test_exempt_from_apc
+
 	for(var/area/A in world)
 		if(A.z == 1 && !(A.type in exempt_areas))
 			area_test_count++